The Heated Platen Press is a hydraulic hot-pressing device specifically designed for pulp and paper laboratories. As a dedicated companion to the AT-CP series sheet formers, it performs hot pressing, pulp molding, and wood-based panel hot pressing on specimens up to 320×260 mm. The machine employs a hydraulic drive with a specialized cylinder and high-pressure retention components that maintain constant pressure for over 4 hours after the pump stops, ensuring short pump runtime, long working duration, and ultra-quiet operation. It features 3000 W heating power with PID intelligent temperature control (±3°C), adjustable working pressure from 0 to 5 MPa, a φ100 mm piston, a platen area of 320×300 mm, and a stroke of 200 mm. Constructed from stainless steel for corrosion resistance and lightweight durability, it satisfies QB/T 3703-1999 standard pressing requirements while also enabling hot calendering experiments. The unit comes complete with felt cloth, plain cotton cloth, and other accessories, making it an ideal companion for standard handsheet preparation and thermoforming research in the laboratory.